Gutter support bracket



FIG. 1 is a front view of a gutter support bracket showing my new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a left side view thereof, the right side being a mirror image;

FIG. 5 is a bottom view thereof. 

The ornamental design for a gutter support bracket, as shown and described. 